Cosgriff House by Christopher Polly Architect

Keeping the original shell of the home, the Cosgriff House was given an environmental and economic renovation and extension designed by architect Christopher Polly. A ground floor living area was inserted beneath the original living space and an extension was added on in the rear that opens up towards the garden.

Located in Annandale, Sydney, Australia, the modestly-sized house expands with the two-story extension that features a uniquely-shaped roof form that allows light to flood both floors.

The lower floor completely opens up to the backyard with sliding glass doors that dissolve the boundaries between indoors and out.